Aluminum 6061 is a lightweight metal that is corrosion resistant. It has a high strength-to-weight ratio and is used in a variety of applications. Aluminum 6063 is also a lightweight metal, but it is not as corrosion resistant as aluminum 6061. It has a lower strength-to-weight ratio, but it is still used in a variety of applications. Both aluminum 6061 and aluminum 6063 are excellent choices for manufacturing products that need to be lightweight and durable. If you are looking for a metal that is both strong and corrosion resistant, aluminum 6061 is a good choice. If you are looking for a metal that is less corrosion resistant, aluminum 6063 is a good choice.